Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed6e118b79fc03b…

MALICIOUS

PDF

87.1 KB Created: 2021-08-15 22:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 83b8fe8989129ad3ad3efab0cf49f7fa SHA-1: 1736e08ec6e8c88b1a41a44a25b1bbd786259888 SHA-256: 9ed6e118b79fc03b28cb0649fdcdaef93e161ce9ea035ee8f660422742911862
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of numerous unknown URLs indicates a broad effort to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/dj9bedh1jaq8jlvk86g6pjd20g/21968636596.pdf In PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/70d958e817e198faa4b4fa130f120d8d/bumav.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/ccb3c78b7fbbb1ec07c53540e31a433e/naguzeluvexukezuregopo.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/kubonev.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/38734380321.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/34111063878.pdfIn PDF document text
    • http://exantusfamilyreunion.com/clients/9/96/968554593547eb574606130639276270/File/20873025732.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/71382788824.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/38217375961.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/6829967049.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/tebizonolukurizotuxalotu.pdfIn PDF document text
    • http://elai.kz/upload//2021/08files/210811024720059134zzwps.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/fmcf9055i4so3ffqre7g9h24is/30227711817.pdfIn PDF document text
    • http://chinazzjx.com/d/files/jukipigoji.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0362476cbf265d3bb2a389c3e398b975/18217466650.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160e92c31862a8---41912757275.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/fngneni1mdrrcpeti7orp4bt80/20710294856.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/xidojufogabi.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/a7c2df21de99afc7357da72a28f7bdb9/delifofonixagexezugo.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/82636889927.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/b18bcb6f2998d1f2a20f71c02a1b90d3/61017815482.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/pogajokugozolulajifudi.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba888a6deec---71129238784.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=dibujos+a+lapiz+faciles+bonitosPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000effd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 17472 bytes
SHA-256: 9306a7d1ae1b75989ae00d802cf2dcf5b76de3c7c40255304d60dec1b9bac323
font_01_sfnt_off00011b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B90 10804 bytes
SHA-256: 2879ebafff0af2a7b29d498ccb1541154ba257dd1d2b28875c463a1a249bb15e
font_02_sfnt_off00013469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13469 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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